@glitterbag,
My cat used to love "hunting" leaves. I lived in a condo that had a balcony. I used to leave my door open so the cats to go out on the balcony and soak up the sun. One cat would hunt leaves as they blew onto the balcony and bring them in the house and pile them up one on top of the other.
I guess this is the house cat version of leaving dead mice on your doorstep.
To be honest I prefer the dead leaves.